﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace xnamame036.mame
{
    class DeflaterConstants
    {
        public const bool DEBUGGING = false;

        public const int STORED_BLOCK = 0;
        public const int STATIC_TREES = 1;
        public const int DYN_TREES = 2;
        public const int PRESET_DICT = 0x20;

        public const int DEFAULT_MEM_LEVEL = 8;

        public const int MAX_MATCH = 258;
        public const int MIN_MATCH = 3;

        public const int MAX_WBITS = 15;
        public const int WSIZE = 1 << MAX_WBITS;
        public const int WMASK = WSIZE - 1;

        public const int HASH_BITS = DEFAULT_MEM_LEVEL + 7;
        public const int HASH_SIZE = 1 << HASH_BITS;
        public const int HASH_MASK = HASH_SIZE - 1;
        public const int HASH_SHIFT = (HASH_BITS + MIN_MATCH - 1) / MIN_MATCH;

        public const int MIN_LOOKAHEAD = MAX_MATCH + MIN_MATCH + 1;
        public const int MAX_DIST = WSIZE - MIN_LOOKAHEAD;

        public const int PENDING_BUF_SIZE = 1 << (DEFAULT_MEM_LEVEL + 8);
        public static int MAX_BLOCK_SIZE = Math.Min(65535, PENDING_BUF_SIZE - 5);

        public const int DEFLATE_STORED = 0;
        public const int DEFLATE_FAST = 1;
        public const int DEFLATE_SLOW = 2;

        public static int[] GOOD_LENGTH = { 0, 4, 4, 4, 4, 8, 8, 8, 32, 32 };
        public static int[] MAX_LAZY = { 0, 4, 5, 6, 4, 16, 16, 32, 128, 258 };
        public static int[] NICE_LENGTH = { 0, 8, 16, 32, 16, 32, 128, 128, 258, 258 };
        public static int[] MAX_CHAIN = { 0, 4, 8, 32, 16, 32, 128, 256, 1024, 4096 };
        public static int[] COMPR_FUNC = { 0, 1, 1, 1, 1, 2, 2, 2, 2, 2 };
    }
}
